JSpec.describe('Calculator: ', function() {
    describe('add', function() {
        it('should works', function() {
            var c = new Calculator();
            c.add(1, 2).should.be(4);
        });

        it('should works', function() {
            var c = new Calculator();
            c.add(2, 2).should.be(4);
        });

        it('should works', function() {
            var c = new Calculator();
            c.add(2, 2).should.be(4);
        });

        it('should works', function() {
            var c = new Calculator();
            c.add(2, 2).should.be(4);
        });

    });
});
